/**
 * Label Studio Wrapper Component for Things Factory
 *
 * This component embeds Label Studio within Things Factory using an iframe.
 * It uses subdomain-based cookie sharing for SSO authentication, eliminating
 * the need for proxying.
 *
 * ## Key Features:
 * - Direct Label Studio access (no proxy needed)
 * - Automatic SSO cookie setup via shared domain
 * - Hidden header for seamless integration
 * - Floating Action Buttons (FAB) for Reload and Fullscreen
 *
 * ## Architecture:
 * 1. Client calls /label-studio/sso/setup
 * 2. Backend sets cookie with shared domain (e.g., .nubison.localhost)
 * 3. Browser → Label Studio (direct, with cookie)
 *
 * ## Configuration Requirements:
 * - Label Studio and Things Factory must use subdomain pattern (e.g., label.example.com, app.example.com)
 * - Label Studio .env must include:
 *   - CSRF_TRUSTED_ORIGINS: Include Things Factory frontend domain
 *   - ALLOWED_HOSTS: Include subdomain patterns
 *   - JWT_SSO_* settings for SSO authentication
 * - Things Factory config must include:
 *   - labelStudio.serverUrl: Label Studio URL
 *   - labelStudio.cookieDomain: Shared cookie domain (e.g., .example.com)
 *
 * ## Usage:
 * ```html
 * <label-studio-wrapper></label-studio-wrapper>
 * ```
 *
 * The component automatically:
 * 1. Calls SSO setup endpoint to establish authentication
 * 2. Builds iframe URL pointing directly to Label Studio
 * 3. Adds ?hideHeader=true to hide Label Studio's header
 * 4. Provides FAB buttons for reload and fullscreen
 */
import { LitElement } from 'lit';
export declare class LabelStudioWrapper extends LitElement {
    static styles: import("lit").CSSResult;
    private loading;
    private error;
    private iframeUrl;
    private path;
    private iframeLoaded;
    private labelStudioUrl;
    private iframe;
    updated(changes: any): Promise<void>;
    buildIframeUrl(): Promise<void>;
    handleIframeLoad(): void;
    handleIframeError(): void;
    handleReload(): void;
    handleFullscreen(): void;
    render(): import("lit-html").TemplateResult<1>;
}